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6. ALL REQUIREMENTS OF SECTION 5.3.7.G.VF THE UDO SHALL BE MET.
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L - i '\O iy \ I ! to ALLOW ACCESS TO GREEN HILL RD ALONG THE EXISTING HAUL ROAD.
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DESIGN HEIGHT AND CROSS SECTION.
0 100 200 300

TEMPORARY/PERMANENT SKIMMER BASIN CONSTRUCTION SPECIFICATION SITE WORK NOTES: m
1. THE CONTRACTOR SHALL VISIT THE SITE TO BECOME FAMILIAR WITH FIELD
6' W E.S. FABRIC GRASS SPECIFICATION
8' W/ WIRE MESH 1. CLEAR, GRUB, AND STRIP THE AREA UNDER THE EMBANKMENT OF ALL VEGETATION CONSTRUCTION CONDITIONS.
2. CONTRACTOR SHALL COORDINATE WORK WITHIN NCDOT AND LOCAL RIGHT
AND ROOT MAT. REMOVE ALL SURFACE SOIL CONTAINING HIGH AMOUNTS OF ORGANIC OF WAYS WITH PROPER AUTHORITIES AND SHALL MEET ANY REQUIREMENTS
STEEL POST 1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER MATTER AND STOCKPILE OR DISPOSE OF IT PROPERLY. HAUL ALL OBJECTIONABLE
WIRE MESH FOR STANDARD FABRIC ADVERSE SOIL CONDITIONS. SKIMMER NOTE: TRAFFIC CONTROL AND CONNECTION TO EXISTING SURE
SKIMMER MUST FLOAT ON TOP OF MATERIAL TO THE DESIGNATED DISPOSAL AREA. PLACE TEMPORARY SEDIMENT 3.3. CLEARING AND GRUBBING: REMOVE ALL TREES AS REQUIRED UNLESS
2. RIP THE ENTIRE AREA TO A 6 INCH DEPTH.
MIN. 14 GA. o x z Ckf v STANDARD OR EXTRA STRENGTH 3. REMOVE ALL ROCKS, ROOTS AND OTHER OBSTRUCTIONS LEAVING SURFACES WATER TO WORK PROPERLY. VENT OPENING FOR CONTROL MEASURES BELOW BASIN BS NEEDED. OTHERWISE NOTED UR REMAIN, STUMPS, ROOTS, SHRUBBERY, ASPHALT,
I Q w FILTER FABRIC SMOOTH AND UNIFORM. CONTRACTOR SHALL VERIFY THAT WATER ENTRY 2. ENSURE THAT FILL MATERIAL FOR THE EMBANKMENT IS FREE OF ROOTS, WOODY CONCRETE, STRUCTURES, BURIED UTILITIES, STORAGE TANKS, ETC. WITHIN Z
6x6 MESH FOR iv _ W E 4OIL_ . APPLY AGRICULTURAL LIME AND FERTILIZER UNIFORMLY AND MIX WITH SOIL. THE BARREL LENGTH WILL ALLOW VEGETATION, ORGANIC MATTER, AND OTHER OBJECTIONABLE MATERIAL. PLACE THE FILL LIMITS OF CONSTRUCTION. O J
STANDARD FABRIC - Q SKIMMER TO FLOAT AT EMERGENCY IN LIFTS NOT TO EXCEED 9 INCHES, AND MACHINE COMPACT IT, OVER FILL THE J
v -0o N w LIME: 45 LBS. PER 1000 S.F. 4. STRIPPING: BEFORE EXCAVATING OR FILLING, REMOVE ALL TOPSOIL, ~ Q
DIRECTION OF WATER FLOW PHOSPHOROUS: 20 LBS PER 1000 S.F. SPILLWAY ELEVATION. EMBANKMENT 6 INCHES TO ALLOW FOR SETTLEMENT. WOOD, LEAVES, AND ANY OTHER UNSUITABLE MATERIAL.
FERTILIZER: S LBS. PER R 1 S.F. 3. SHAPE THE BASIN TO THE SPECIFIED DIMENSIONS. PREVENT THE SKIMMING DEVICE 5. MUCKING: REMOVE ANY SOFT, ORGANIC SILT MATERIALS AND EXISTING
5. CONTINUE TILLAGE UNTIL A WELL PULVERIZED, FIRM, UNIFORM SEED BED IS FROM SETTLING INTO THE MUD BY EXCAVATING A SHALLOW PIT UNDER THE SKIMMER BURIED CONSTRUCTION DEBRIS AS REQUIRED AND FILL TO SUBGRADE w z Z
ANCHOR FABRIC SKIRT OR PROVIDING A LOW SUPPORT UNDER THE SKIMMER OF STONE OR TIMBER.
PREPARED ILL INCHES DEEP. ELEVATIONS WITH A CLEAN SELECT-FILL COMPACTED AS SPECIFIED. � O J
o z MIN. 8" DEEP & 4" WIDE. 6. SEED ON A FRESHLY PREPARED SEED BED AND COVER SEED LIGHTLY. 4. PLACE THE BARREL (TYPICALLY 4-INCH SCHEDULE 40 PVC PIPE) ON A FIRM, 6. DISPOSAL: CLEARED, GRUBBED, STRIPPED OR EXCAVATED SPOIL SHALL cn
N 2 - 3 LBS PER 1000 S.F. (SEE MIXTURE BELOW) SMOOTH FOUNDATION OF IMPERVIOUS SOIL. DO NOT USE PERVIOUS MATERIAL LLJ
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OPENING FOR WATER ENTRY BE REMOVED FROM SITE AND DISPOSED OF IN ACCORDANCE WITH ALL >
7. MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH. SUCH AS SAND, GRAVEL, OR CRUSHED STONE AS BACKFILL AROUND THE PIPE. APPLICABLE LOCAL AND STATE CODES. Q
1 GRAIN STRAW & HAY AT 75 TO 100 LBS PER 1000 S.F. PLACE THE FILL MATERIAL AROUND THE PIPE SPILLWAY IN 4-INCH LAYERS AND 7. BORROW MATERIAL: THE CONTRACTOR SHALL FURNISH BORROW
WOOD CHIPS AT 500 LBS. PER 1000 S.F. COMPACT IT UNDER AND AROUND THE PIPE TO AT LEAST THE SAME DENSITY AS THE MATERIAL REQUIRED FROM OFF SITE AND OBTAIN ALL REQUIRED PERMITS 0_
JUTE & MESH AS PER MANUFACTURER FLOAT ADJACENT EMBANKMENT. CARE MUST BE TAKEN NOT TO RAISE THE PIPE FROM THE ASSOCIATED WITH BORROW OPERATIONS. V
NOTES: FLEXIBLE JOINT
1. SYN. FENCE FABRIC SHALL BE MIN. OF 30" IN WIDTH 8. ASPHALT FOR ANCHORING MULCH SHALL BE TYPE SS-1 EMULSION AND FIRM CON!ACT WITH ITS FOUNDATION WHEN COMPACTING UNDER THE PIPE HAUNCHES. g. FILL AND COMPACTION: AFTER STRIPPING THOSE AREAS DESIGNATED
APPLIED AT A RATE OF 1000 GAL. PER ACRE FOR SLOPE STABILIZATION, BARREL PIPE RECEIVE FILL SHOULD BE PROOFROLLED. THE TOP 8" OF SUBGRADE SHALL w C1
WITH 30 LB/IN TENSILE STRENGTH FOR STANDARD FABRIC AND 150 GAL. PER TON OF STRAW FOR ANCHORING STRAW. PLACE A MINIMUM DEPTH OF 2 FEET OF COMPACTED BACKFILL OVER THE PIPE
REFER TO TABLE FOR REQUIRED LENGTH. BE COMPACTED TO AT LEAST 98% OF MAXIMUM DENSITY AT OPTIMUM 0 �
AND 50 LB/IN FOR EXTRA STRENGTH. 9. INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RESEED SPILLWAY BEFORE CROSSING IT WITH CONSTRUCTION EQUIPMENT. IN NO CASE MOISTURE CONTENT. ANY AREA WHICH PUMPS OR RUTS EXCESSIVELY
2. FABRIC SHALL BE CONTINUOUS LENGTH. IF JOINTS ARE WITHIN THE PLANTING SEASON, IF POSSIBLE. IF GRASS STAND SHOULD BE SHOULD THE PIPE CONDUIT BE INSTALLED BY CUTTING A TRENCH THROUGH THE DAM SHOULD BE UNDERCUT AND REPLACED WITH A CLEAN, SILTY OR CLAYEY (aO
NECESSARY, LAP FABRIC POST TO POST.. OVER 60% DAMAGED, REESTABLISH FOLLOWING ORIGINAL LIME, FERTILIZER AFTER THE EMBANKMENT IS COMPLETE. SAND HAVING A UNIFIED SOIL CLASSIFICATION OF SP, SM, OR SC. FILL Z
3. STEEL POST SHALL BE MIN 4' IN HEIGHT AND BE OF THE AND SEEDING RATES. 5. ASSEMBLE THE SKIMMER FOLLOWING THE MANUFACTURER INSTRUCTIONS, OR MATERIAL 5" OUTSIDE OF BUILDING AREAS SHALL THEN BE PLACED IN O
SELF-FASTENER STEEL ANGLE TYPE. 10. CONSULT CONSERVATION INSPECTOR ON MAINTENANCE, TREATMENT, AND AS DESIGNED. LAYERS NOT TO EXCEED 8" AND COMPACTED TO AT LEAST 95% OF THE
FERTILIZATION AFTER PERMANENT COVER IS ESTABLISHED. OUTLET END 6. LAY THE ASSEMBLED SKIMMER ON THE BOTTOM OF THE BASIN WITH THE
11. SEED FOR TEMPORARY AND PERMANENT APPLICATIONS SHALL BE: CONNECT TO OUTLET FLEXIBLE JOINT AT THE INLET OF THE BARREL PIPE. ATTACH THE FLEXIBLE JOINT TO STANDARD PROCTOR MAXIMUM DRY DENSITY (ASTM D-O 9 WITH THE � z
TEMPORARY SILT FENCE 20% CARPET GRASS PIPE OR RISER. UPPER 12 INCHES OF SUBGRADE BEING COMPACTED TO 98% OF THE z z
NTS 24% BERMUDA GRASS REFER TO TABLE FOR THE BARREL PIPE AND POSITION THE SKIMMER OVER THE EXCAVATED PIT OR STANDARD PROCTOR MAXIMUM DRY DENSITY. FILL MATERIALS WITHIN �CC Q Z
24% TURF FESCUE 10% CREEPING RED FESCUE REQUIRED DIAMETER SUPPORT. BE SURE TO ATTACH A ROPE TO THE SKIMMER AND ANCHOR IT TO THE BUILDING AREAS TO A LINE OUTSIDE THE BUILDING AREAS SHALL BE G
SIDE OF THE BASIN, THIS WILL BE USED TO PULL THE SKIMMER TO THE SIDE FOR Q
MAINTENANCE. PLACED IN LAYERS NOT TO EXCEED 8" AND COMPACTED TO AT LEAST 98%
24% ANNUAL RYE GRAIN
*BERMUDA SEED SHALL BE HULLED FOR WARM WEATHER 7, EARTHEN SPILLWAYS---INSTALL THE SPILLWAY IN UNDISTURBED SOIL TO THE OF THE STANDARD PROCTOR MAXIMUM DRY DENSITY (ASTM D-698) WITH Z V
PLANTING. PURITY OF SEED SHALL BE A MIN. OF 98% AND GREATEST EXTENT POSSIBLE. THE ACHIEVEMENT OF PLANNED ELEVATIONS, GRADE, THE UPPER 12 INCHES OF SUBGRADE BEING COMPACTED IN 6 INCH
GERMINATION SHALL BE A MIN. OF 85%. DESIGN WIDTH, AND ENTRANCE AND EXIT CHANNEL SLOPES ARE CRITICAL TO THE LAYERS TO 100% OF THE STANDARD PROCTOR MAXIMUM DRY DENSITY. IN Q
MPLETION OF SUCCESSFUL OPERATION OF THE SPILLWAY. THE SPILLWAY SHOULD BE LINED AREAS WHERE NO STRUCTURAL FILL IS TO BE PLACED THE UPPER 12 J
ALL DISTURBED AREA SHALL BE SEEDED WITHIN 15 DAYS OF THE CO STANDARD SKIMMER DETAIL (FAIRCLOTH) WITH LAMINATED PLASTIC OR IMPERMEABLE GEOTEXTILE FABRIC. THE FABRIC MUST BE INCHES OF IN-PLACE SUBGRADE SHOULD BE COMPACTED TO AT LEAST 98%
GRADING. CONSULT CONSERVATION ENGINEER OR SOIL CONSERVATION SERVICE FOR WIDE AND LONG ENOUGH TO COVER THE BOTTOM AND SIDES AND EXTEND ONTO THE OF THE STANDARD PROCTOR MAXIMUM DRY DENSITY, IF THE MATERIAL IS
ADDITIONAL INFORMATION CONCERNING OTHER ALTERNATIVES FOR VEGETATION OF N.T.S. TOP OF THE DAM FOR ANCHORING IN A TRENCH. THE EDGES MAY BE SECURED WITH TOO DRY TO COMPACT TO THE REQUIRED DENSITY EACH LAYER SHALL BE
DENUDED AREAS. THE ABOVE VEGETATION RATES ARE THOSE WHICH DO WELL 8-INCH STAPLES OR PINS. THE FABRIC MUST BE LONG ENOUGH TO EXTEND DOWN WETTED IN ACCORDANCE WITH COMPACTION REQUIREMENTS. IF THE MATERIAL
UNDER LOCAL CONDITIONS, OTHER SEEDING SCHEDULES MAY BE POSSIBLE. THE SLOPE AND EXIT ONTO STABLE GROUND. THE WIDTH OF THE FABRIC MUST BE
IS TOO WET TO SECURE PROPER COMPACTION, IT SHALL BE HARROWED W Z N
ONE PIECE, NOT JOINED OR SPLICED; OTHERWISE WATER CAN GET UNDER THE REPEATEDLY OR OTHERWISE AERATED WITH SUITABLE EQUIPMENT UNTIL Q z W
FABRIC. IF THE LENGTH OF THE FABRIC IS INSUFFICIENT FOR THE ENTIRE LENGTH OF OPTIMUM MOISTURE CONTENT IS OBTAINED. FILL SHALL BE PLACED IN SUCH Z LU
THE SPILLWAY, MULTIPLE SECTIONS, SPANNING THE COMPLETE WIDTH, MAY BE USED. A MANNER THAT THE SURFACE WILL DRAIN READILY AT ALL TIMES. SEE W W
THE UPPER SECTION(S) SHOULD OVERLAP THE LOWER SECTION(S) SO THAT WATER STRUCTURAL NOTES AND SOILS REPORT FOR ADDITIONAL REQUIREMENTS. 'R
NPDES STABILIZATION TIMEFRAMES TOP TOP CANNOT FLOW UNDER THE FABRIC. SECURE THE UPPER EDGE AND SIDES OF THE 9. LAYOUT: THE CONTRACTOR SHALL PROVIDE ALL LAYOUT REQUIRED TO 0 � v in
SITE AREA DESCRIPTION STABILIZATION TIMEFRAME EXCEPTIONS - FABRIC IN A TRENCH WITH STAPLES OR PINS. (ADAPTED FROM "A MANUAL FOR CONSTRUCT HIS WORK.
o i AND MAINTAINING SKIMMER SEDIMENT BASINS." FEBRUAf�Y, 10. THE CONTRACTOR IS RESPONSIBLE FOR THE LOCATION AND PROTECTION
DESIGNING, INSTALLING R
i OF EXISTING UTILITIES DURING CONSTRUCTION.
OQ PERIMETER DIKES, SWALES, DITCHES AND SLOPES 7 DAYS NONE I 1999. 1. W. FAIRCLOTH & SON.). 11. EXISTING BOUNDARY INFORMATION BY GIS & AERIAL PHOTOGRAPHY AND
G� HIGH QUALITY WATER (HQW) ZONES 7 DAYS NONE 1� I_ _BOTTOM -I I 8, INLETS-DISCHARGE WATER INTO THE BASIN IN A MANNER TO PREVENT EROSION. PROVIDED BY OWNER.
J 3 3 USE SEDIMENT LADEN WAORARY OTER PE DRAINS
NHE UPPER ENIDNOFNTHE POOL AREA TO ITH OUTLET IMPROVON OE DIVERT
12. THE CONTRACTOR SHALL VERIFY DIMENSIONS AT JOBSITE. U
Q IF SLOPES ARE 10' OR LESS IN LENGTH AND ARE NOT
' ' ' ' 13. THE CONTRACTOR IS RESPONSIBLE FOR THE COORDINATION OF
SC' SLOPES STEEPER THAN 3:1 7 DAYS STEEPER THAN 2:1 14 DAYS ARE ALLOWED TRAP EFFICIENCY (REFERENCES: RUNOFF CONTROL MEASURES AND OUTLET RELOCATION OR DISCONNECTION OF ALL EXISTING UTILITIES WITH
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SLOPES 3:1 OR FLATTER 14 DAYS 7 DAYS FOR SLOPES GREATER THAN 50' IN LENGTH PROTECTION. APPLICABLE AGENCIES AND AUTHORITIES.
E MENT BASIN SECTION 14. ALL PAVEMENT AND BASE MATERIALS AND WORKMANSHIP SHALL cu
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O ALL OTHER AREAS WITH SLOPES FLATTER THAN 4:1 14 DAYS NONE, EXCEPT FOR PERIMETERS AND HQW ZONES 9. EROSION CONTROL-CONSTRUCT THE STRUCTURE SO THAT THE DISTURBED AREA CONFORM TO NCDOT STANDARDS.
IS MINIMIZED. DIVERT SURFACE WATER AWAY FROM BARE AREAS. COMPLETE THE 15. ALL AREAS SHALL BE GRADED FOR POSITIVE DRAINAGE. 00
N.T.S. 16. CONTRACTOR SHALL NOTE THAT EARTHWORK QUANTITIES ARE HIS P., 0
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EMBANKMENT BEFORE THE AREA IS CLEARED. STABILIZE THE EMERGENCY SPILLWAY
EMBANKMENT AND ALL OTHER DISTURBED AREAS ABOVE THE CREST OF THE RESPONSIBILITY. PLANS DO NOT REPRESENT A BALANCED EARTHWORK
PRINCIPAL SPILLWAY IMMEDIATELY AFTER CONSTRUCTION (REFERENCES: SURFACE CONDITION. 00
STABILIZATION).
10. INSTALL POROUS BAFFLES AS SPECIFIED IN PRACTICE 6.65, POROUS BAFFLES.
CLASS A STONE 11, AFTER ALL THE SEDIMENT-PRODUCING AREAS HAVE BEEN PERMANENTLY EROSION CONTROL NOTES AND MAINTENANCE PLAN .0 Z
6" MIN. \�." GENERAL NOTES:
2" - 3 � STABILIZED, REMOVE THE STRUCTURE AND ALL THE UNSTABLE SEDIMENT. 1. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED FOR W a� �' b T-
SMOOTH DETERMINE BORROW PIT DEWATERING BASIN SIZE USING SMOOTH THE AREA TO BLEND WITH THE ADJOINING AREAS AND STABILIZE PROPERLY STABILITY AND OPERATION FOLLOWING EVERY RUNOFF-PRODUCING RAINFALL, Z
COARSE AGGREGATE V = 8.0203 * Q * T, WHERE V IS VOLUME (FT3), Q IS FILTRATION (REFERENCES: SURFACE STABILIZATION). BUT IN NO CASE, LESS THAN ONCE EVERY WEEK AND WITHIN 24 HOURS OF y o a) o
PUMP FLOW RATE (GPM), AND T IS DEWATERING TIME (HR). GEOTEXTILE EVERY HALF-INCH RAINFALL. C) �` a F
USE MAXIMUM FLOW RATE OF 1000 GPM AND A MINIMUM MAINTENANCE 2. ALL POINTS OF EGRESS WILL HAVE CONSTRUCTION ENTRANCES THAT WILL
DEWATERING TIME OF 2 HOURS. ? BE PERIODICALLY TOP-DRESSED WITH AN ADDITIONAL 2 INCHES OF #4 STONE
TEMPORARY GRAVEL ffil
STONE ENERGY INSPECT SKIMMER SEDIMENT BASINS AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT TO MAINTAIN PROPER DEPTH. THEY WILL BE MAINTAINED IN A CONDITION TO
RISER SHALL BE A NON-PERFORATED, SMOOTH OR CORRUGATED STEEL POST DISSIPATOR (ONE-HALF INCH OR GREATER) RAINFALL EVENT AND REPAIR IMMEDIATELY. PREVENT MUD OR SEDIMENT FROM LEAVING THE SITE. IMMEDIATELY REMOVE
CONSTRUCTION ENTRANCE MATERIAL WITH A FLASHBOARD OPTION. REMOVE SEDIMENT AND RESTORE THE BASIN TO ITS ORIGINAL DIMENSIONS WHEN OBJECTIONABLE MATERIAL SPILLED WASHED OR TRACKED ONTO THE
CONSTRUCT THE COIR FIBER BAFFLE IN ACCORDANCE WITH ROADWAY SEDIMENT ACCUMULATES TO ONE
THE HEIGHT OF THE FIRST BAFFLE. PULL CONSTRUCTION ENTRANCE OR ROADWAYS.
NTS STANDARD DRAWING 1640.01 AND WITH MATERIAL THAT MEETS THE THE SKIMMER TO ONE SIDE 80 THAT THE SEDIMENT UNDERNEATH IT CAN BE 3. DIVERSION DITCHES WILL BE CLEANED OUT IMMEDIATELY TO REMOVE
EXCAVATED. EXCAVATE THE SEDIMENT FROM THE ENTIRE BASIN, NOT JUST AROUND SEDIMENT OR OBSTRUCTIONS FROM THE FLOW AREA. THE DIVERSION RIDGES
SPECIFICATIONS OF ROADWAY STANDARD 1060-14. 3
THE SKIMMER OR THE FIRST CELL. MAKE SURE VEGETATION GROWING IN THE BOTTOM WILL ALSO BE REPAIRED. SWALES MUST BE TEMPORARILY STABILIZED WITHIN
OF THE BASIN DOES NOT HOLD DOWN THE SKIMMER. 21 CALENDAR DAYS OF CEASE OF ANY PHASE OF ACTIVITY ASSOCIATED WITH A
PROVIDE 5' STEEL POST OF THE SELF-FASTENER ANGLE STEEL TYPE. SWALE.
INSTALL STEEL POSTS WITH NO MORE THAN 3' OF THE POST APPEARING
ABOVE THE GROUND. REPAIR THE BAFFLES IF THEY ARE DAMAGED. RE-ANCHOR THE BAFFLES IF WATER 4. SEDIMENT WILL BE REMOVED FROM BEHIND THE SEDIMENT FENCE WHEN
n IS FLOWING UNDERNEATH OR AROUND THEM. IT BECOMES HALF FILLED. THE SEDIMENT FENCE WILL BE REPAIRED AS
1 4 L T MAINTAIN A BARRIER. STAKES MUST BE STEEL. STAKE o 0
NECESSARY 0
ATTACH THE COIR FIBER MAT TO THE STEEL POSTS WITH WIRE OR " "=2"W" MIN. SPACING WILL BE 6 FEET MAX. WITH THE USE OF EXTRA STRENGTH FABRIC, o`to
OTHER ACCEPTABLE MEANS AND STAPLED INTO THE BOTTOM AND SIDE RISER IF THE SKIMMER IS CLOGGED WITH TRASH AND THERE IS WATE Cl
R IN THE BASIN,
SLOPES OF THE BASIN WITH 12" STAPLES. USUALLY JERKING ON THE ROPE WILL MAKE THE SKIMMER BOB UP AND DOWN AND
WITHOUT WIRE BACKING. STAKE SPACING WILL BE 8 FEET MAX. WHEN N 1
DISLODGE THE DEBRIS AND RESTORE FLOW. IF THIS DOES NOT WORK, PULL THE STANDARD STRENGTH FABRIC AND WIRE BACKING ARE USED. IF ROCK FILTERS U
TYPE 2 GEOTEXTILE ON SIDE SLOPES AND BOTTOM OF BASIN AT SKIMMER OVER TO THE SIDE OF THE BASIN AND REMOVE THE DEBRIS. ALSO CHECK ARE DESIGNED AT LOW POINTS IN THE SEDIMENT FENCE, THE ROCK WILL BE rs Z o
INSTALL THE ORIFICE INSIDE THE SKIMMER TO SEE IF IT IS CLOGGED; IF SO REMOVE THE REPAIRED OR REPLACED IF IT BECOMES HALF-FULL OF SEDIMENT, NO LONGER
INLET AS SHOWN IN THE DETAIL. DRAINS AS DESIGNED OR IS DAMAGED. .�
DEBRIS. � W
USE THE TYPICAL SECTION SHOWN FOR THE BORROW PIT DEWATERING 5. ALL SEEDED AREAS WILL BE FERTILIZED, RESEEDED AS NECESSARY, AND
IN MAY HAVE ANY TYPE CONFIGURATION AS EARTH DIKE IF THE SKIMMER ARM OR BARREL PIPE IS CLOGGED, THE ORIFICE CAN BE REMOVED MULCHED, ACCORDING TO SPECIFICATIONS IN THE VEGETATIVE PLAN, TO ,,/ a C
BASIN AS A GUIDE. THE BASIN MAINTAIN A VIGOROUS, DENSE VEGETATIVE COVER. ALL SLOPES WILL BE W
LONG AS SUFFICIENT VOLUME IS PROVIDED AND PROVISIONS ARE MADE AND THE OBSTRUCTION CLEARED WITH A PLUMBER'S SNAKE OR BY-FLUSHING WITH
FOR ANON-PERFORATED RISER. PLAN WATER. BE SURE AND REPLACE THE ORIFICE BEFORE REPOSITIONING THE SKIMMER. STABILIZED WITHIN 21 CALENDAR DAYS. ALL OTHER AREASWILL BE STABILIZED z
WITHIN 15 WORKING DAYS. : WATER QUALITY REQUIRES ALL SEEDED AREAS a
CHECK THE FABRIC LINED SPILLWAY FOR DAMAGE AND MAKE ANY REQUIRED WILL BE FERTILIZED, RESEEDED AS NECESSARY AND MULCHED ACCORDING TO
DO NO EXCEED 3.5 FT. IN HEIGHT FOR THE EARTH DIKES REQUIRED FOR w
BORROW PIT DEWATERING BASIN. REPAIRS WITH FABRIC THAT SPANS THE FULL WIDTH OF THE SPILLWAY. CHECK THE SPECIFICATIONS IN THE VEGETATIVE PLAN TO MAINTAIN A VIGOROUS, DENSE
EMBANKMENT, SPILLWAYS, AND OUTLET FOR EROSION DAMAGE, AND INSPECT THE VEGETATIVE COVER. ALL PERIMETER DIKES, SWALES, HORIZONTAL TO 'DITCHES, h C,
TOP BANK ELEV. J
VARIES FROM 38' TO 30' THE BORROW PIT DEWATERING BASIN SIZE IS VARIABLE AND DEPENDENT - EMBANKMENT FOR PIPING AND SETTLEMENT. MAKE ALL NECESSARY REPAIRS PERIMETER ;LOPES, ALL SLOPES STEEPER THAN 3 VERTICAL (3:1) AND ALL
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ON SPECIFIC SITE REQUIREMENTS AS WELL AS PROPOSED CONSTRUCTION to IMMEDIATELY. REMOVE ALL TRASH AND OTHER DEBRIS FROM THE SKIMMER AND HIGH QUALITY WATER (HQW) ZONES SHALL BE ' 1 PROVIDED TEMPORARY OR
PERMANENT STABILIZATION WITH GROUND COVER AS SOON AS PRACTICABLE BUT
OPERATIONS. 1.0 f 1.0 f POOL AREAS. IN ANY EVENT WITHIN SEVEN (7) CALENDAR DAYS FROM THE LAST h c�
MINE RECLAMATION 1�_ -FINAL NORMAL WATER ELEVATION SUBMIT THE SIZE, LOCATION AND RISER PIPE MATERIAL FOR APPROVAL 1 I 1 FREEZING WEATHER CAN RESULT IN ICE FORMING IN THE BASIN. SOME SPECIAL LAND-DISTURBING ACTIVITY. ALL OTHER DISTURBED AREAS SHALL BE PROVIDED `J
BACKSLOPE 3 AVERAGE 1 v
SUBMI TO CONSTRUCTION. 1 PRECAUTIONS SHOULD BE TAKEN IN THE WINTER TO PREVENT THE SKIMMER FROM TEMPORARY OR PERMANENT STABILIZATION WITH GROUND COVER AS SOON AS W
DEPTH = 25' PLUGGING WITH ICE. PRACTICABLE BUT IN ANY EVENT WITHIN FOURTEEN (14) CALENDAR DAYS FROM
PUMP THE EFFLUENT INTO THE BORROW PIT DEWATERING BASIN TO A THE LAST LAND-DISTURBING ACTIVITY. -w V)
1 MAXIMUM DEPTH OF 6 IN. BELOW TOP OF THE EARTH DIKE. UNCLASSIFIED 6. FLOCCULANTS WILL BE USED TO ADDRESS TURBIDITY ISSUES. THE V,
2 ) EARTH MATERIAL STEEL POSTS ANTI-SEEP PUMPS, TANKS, HOSES AND INJECT SYSTEMS WILL BE CHECKED FOR �� Q Z c
BOTTOM ELEV. VARIES �rj COLLAR
PROVIDE A STONE ENERGY DISSIPATER PAD AT THE OUTLET OF THE PROBLEMS OR TURBID DISCHARGES DAILY.
PUMP DISCHARGE HOSE AND OUTLET OF THE RISER BARREL IN VARIABLE w M
ACCORDANCE WITH ROADWAY STANDARD DRAWING 876.02 FOR OUTLET COIR FILTER Z M
MINE SLOPE & RECLAMATION CROSS SECTION W 0 DITCH, BAFFLE
TYPICAL SECTION VIEW BAFFLE CONSTRUCTION SPECIFICATION U
NTS
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NOTES: A SECOND CHAMBER 1.TO SIDE.
THE BASIN SO THAT THE BOTTOM IS LEVEL FRONT TO BACK AND SIDE O O
1. DEPTH OF MINE WILL BE DICTATED BY SUITABLE MATERIAL. BORROW PIT DEWATERING BASIN DETAIL FIRST CHAMBER OUTLET ZONE
25% OF SURFACE AREA
2. AT RECLAMATION ALL BANKS ABOVE NORMAL WATER WILL BE INLET ZONE 25% OF SURFACE ARE25% OF SURFACE
SLOPED & GRADED AT 4:1 & STABILIZED WITH GRASSING. 25% OF SURFACE AREA AREA ( INSTALL POSTS DI SAW HORSES ACROSS THE WIDTH OF THE SEDIMENT TRAP J
AREA (PRACTICE 6.62, SEDIMENT FENCE).
3. STEEL POSTS SHOULD BE DRIVEN TO A DEPTH OF 24 INCHES, SPACED A
MAXIMUM OF 4 FEET APART, AND INSTALLED UP THE SIDES OF THE BASIN AS WELL.
MIN. 20' THE TOP OF THE FABRIC SHOULD BE 6 INCHES HIGHER THAN THE INVERT OF THE
SPILLWAY. TOPS OF BAFFLES SHOULD BE 2 INCHES LOWER THAN THE TOP OF THE
EXTEND 9 GAUGE TO 5' CREST WIDTH BERMS.
BASIN SIDE OR INSTALL OUTLET STRUCTURE
SEE DETAIL 4. INSTALL AT LEAST THREE ROWS OF BAFFLES BETWEEN THE INLET AND OUTLET
COMPACTED SOIL T-POST TO ANCHOR DISCHARGE POINT. BASINS LESS THAN 20 FEET IN LENGTH MAY USE 2 BAFFLES.
ROADWAY
BAFFLE TO SIDE OF SD PIPE CONTINUES
DRAPE BAFFLE MATERIAL OVER WIRE BASIN AND SECURE TO INFLOW TO OUTLET LOCATION 5, WHEN USING POSTS, ADD A SUPPORT WIRE OR ROPE ACROSS THE TOP OF THE
STRAND AND SECURE WITH PLASTIC TIES VERTICAL POST STRUCTURE D y Licence #C-3641
MEASURE TO PREVENT SAGGING.
AT POSTS AND ON WIRE EVERY 12" 4' MAX. m 19016
6. WRAP POROUS MATERIAL, LIKE JUTE BACKED BY COIR MATERIAL, OVER A
m m m SAWHORSE OR THE TOP WIRE. HAMMER REBAR INTO THE SAWHORSE LEGS FOR
HAUL ROAD SECTION 3' MIN. =I VARIABLE DEPTH RIPRAP OR ANCHORING. THE FABRIC SHOULD HAVE FIVE TO TEN PERCENT OPENINGS IN THE DES. JKB
- SLOPE DRAIN WIRE, OR STAPLES.
TO A ROPE AND A SUPPORT STRUCTURE WITH ZIP TIES,
cKD. JPN
NTS 9 GAUGE MIN. HIGH
TENSION WIRE STRAND -
- 7. THE BOTTOM AND SIDES OF THE FABRIC SHOULD BE ANCHORED IN A TRENCH DRWN. ZAC
SHALL BE SECURED SECURE BOTTOM OF BAFFLE TO
TO POST TO SUPPORT _ _ _- = I GROUND WITH 12" STAPLES AT EARTHEN EMBANKMENT OR PINNED WITH 8-INCH EROSION CONTROL MATTING STAPLES.
BAFFLE MATERIAL CONNECT SKIMMER TO 8. DO NOT SPLICE THE FABRIC, BUT USE A CONTINUOUS PIECE ACROSS THE BASIN.WITH STABILIZED SIDE SKIMMER SEE DETAIL DATE 01/16/24
BAFFLE MATERIAL 12" MAXIMUM SPACING
SLOPES OUTLET
ORIFICE.
MAINTENANCE �lls fol
BAFFLE MATERIAL REMOVE SKIMMER
RETURN BASIN AND ,�� •.. 3 ��
NOTES: * IF THE TEMPORARY SEDIMENT
OUTLET STRUCTURE TO INSPECT BAFFLES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY •O y
1. MINING TO COMMENCE ON AN AS NEEDED BASIS. BASIN WILL BE CONVERTED TO A 11 GAUGE STORMWATER DESIGN REQUIRED REPAIRS IMMEDIATELY. 2 y;7
2. RECLAMATION IS REQUIRED PRIOR TO MINE CLOSE OUT. PERMANENT STORMWATER BASIN LANDSCAPING EMERGENCY CONDITIONS ® S E A L
3. NO PERMANENT STRUCTURES OR PERMANENT EMPLOYEES ARE OF GREATER DEPTH, THE BAFFLE STAPLE SPILLWAY CONSTRUCTION BE SURE TO MAINTAIN ACCESS TO THE BAFFLES. SHOULD THE FABRIC OF A BAFFLE O 6 0
PROPOSED ON SITE. HEIGHT SHOULD BE BASED ON = _ _ COMPLETION. COLLAPSE, TEAR, DECOMPOSE, OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY. •
4. THE HOURS OF OPERATION WILL BE MONDAY THRU FRIDAY FROM 7:30 THE POOL DEPTH DURING USE AS _ __I F � �� �'-4
AM TO 5:00 PM. A TEMPORARY SEDIMENT BASIN. III-III- I I III I I REMOVE SEDIMENT DEPOSITS WHEN IT REACHES HALF FULL TO PROVIDE ADEQUATE �v0 '•.N•INE�.�t1 �.
5. BUFFERS SHALL BE NATURAL VEGETATION SUPPLEMENTED WITH POROUS BAFFLES IN A SEDIMENT BASIN. THE FLOW IS DISTRIBUTED EVENLY STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON THE �i s Q' '�
PLANTINGS AS NOTE: INSTALL THREE (3) COIR FIBER BAFFLES , Fp �� ``
ACROSS THE BASIN TO REDUCE FLOW RATES AND TURBULENCE, RESULTING BAFFLES. TAKE CARE TO AVOID DAMAGING THE BAFFLES DURING
CLEANOUT. i����IH'K ���
NECESSARY TO MEET REQUIREMENTS. IN BASINS AT DRAINAGE OUTLETS WITH A
IN GREATER SEDIMENT RETENTION. SEDIMENT DEPTH SHOULD NEVER EXCEED HALF THE DESIGNED STORAGE DEPTH.
6. A 30FT ACCESS EASEMENT SHALL BE PROVIDED FOR ALL MINES TO SPACING OF 1/4 THE BASIN LENGTH. TWO (2) AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED, REMOVE
ALLOW COIR FIBER BAFFLES CAN BE INSTALLED IN ALL ACCESS N OPERATOR NEW RITTON HWY E ALONG THE USE A WATER TRUCK EXISTING
HAUL ROAD.DUST ALONG THE BASINS LESS THAN 20 FT. IN LENGTH7. WITH A SPACING OF 1/3 THE BASIN LENGTH. TYPICAL SKIMMER SEDIMENT BASIN & POROUS BAFFLE DETAIL GRADE,BAFFLE
STABILIZE IT.
UNSTABLE SEDIMENT DEPOSITS, BRING THE AREA TO
THE HAUL
ROAD AS NECESSARY.
FIGURE 6.65b COIR FIBER BAFFLE DETAIL NTS C2
CROSS SECTION OF A POROUS BAFFLE IN NOTE: SEE PLAN FOR BAFFLE LOCATIONS.
A SEDIMENT BASIN.